72973497 has 4 divisors (see below), whose sum is σ = 97298000. Its totient is φ = 48648996.

The previous prime is 72973487. The next prime is 72973529. The reversal of 72973497 is 79437927.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72973497 - 2¹² = 72969401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72973447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12162247 + ... + 12162252.

It is an arithmetic number, because the mean of its divisors is an integer number (24324500).

Almost surely, 2^72973497 is an apocalyptic number.

It is an amenable number.

72973497 is a deficient number, since it is larger than the sum of its proper divisors (24324503).

72973497 is a wasteful number, since it uses less digits than its factorization.

72973497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24324502.

The product of its digits is 666792, while the sum is 48.

The square root of 72973497 is about 8542.4526337581. The cubic root of 72973497 is about 417.8833358783.

The spelling of 72973497 in words is "seventy-two million, nine hundred seventy-three thousand, four hundred ninety-seven".